/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.druid.server;

import org.apache.druid.query.context.ResponseContext;
import org.junit.Assert;
import org.junit.Test;

import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.Response;

/**
 * Tests for low-level bits of the query resource mechanism.
 */
public class QueryDetailsTest
{
  @Test
  public void testEtag()
  {
    // No ETAG
    {
      ResponseContext responseContext = ResponseContext.createEmpty();
      Response.ResponseBuilder responseBuilder = Response.ok();
      QueryResource.transferEntityTag(responseContext, responseBuilder);
      Response response = responseBuilder.build();
      MultivaluedMap<String, Object> metadata = response.getMetadata();
      Assert.assertNull(metadata.get(QueryResource.HEADER_ETAG));
    }

    // Provided ETAG is passed along.
    {
      ResponseContext responseContext = ResponseContext.createEmpty();
      String etagValue = "myTag";
      responseContext.putEntityTag(etagValue);
      Response.ResponseBuilder responseBuilder = Response.ok();
      QueryResource.transferEntityTag(responseContext, responseBuilder);
      Response response = responseBuilder.build();
      MultivaluedMap<String, Object> metadata = response.getMetadata();
      Assert.assertEquals(etagValue, metadata.getFirst(QueryResource.HEADER_ETAG));
    }
  }
}
